Periodic table and Reactivity

Four students were asked to name the parts of an atom that determine the atom’s chemical properties. The students’ responses are shown in the table below. Which student’s responses are correct?

• Student 1

• Student 2

• Student 3

• Student 4

How can you tell if 2 elements are from the same periods on the periodic table of elements?

• They are from the same periods if they have the same number of valence electrons

• They are from the same periods if they have the same number of energy levels or shells

• They are from the same periods if they have they react similarly

• They are from the same periods if they have similar chemical properties

Which atomic diagram is considered to be a nonmetal, nonreactive, and a gas?

• A

• B

• C

• D

How can you tell if 2 elements are from the same group?

• They have the same number of energy levels or shells

• They are aligned horizontally in the periodic table

• They have similar chemical and physical properties

• none of these

Which elements in the picture are more similar in physical and chemical properties?

• Boron (B) and Silicon (Si)

• Aluminum (Al) and Carbon (C)

• Carbon (C) and Silicon (Si)

• Boron (B) and Carbon (C)

How do find the valence electrons of an atom?

• Count all the electrons that you will see in the Bohr model of an atom

• Count only the electrons in the third energy level

• Count only the electrons in the outermost occupied shell

• Count the number of protons and electrons

Elements found in which shaded area of the Periodic Table undergo the fewest chemical reactions?

• Q

• R

• S

• T

What happens to reactivity down a metal group?

• increases

• decreases

• does not change

• It's unpredictable

Which elements in the picture are in the same period?

• Fluorine (F) and Chlorine (Cl)

• Chlorine (Cl) and Neon (Ne)

• Neon (Ne) and Argon (Ar)

• Fluorine (F) and Neon (Ne)

•What happens to reactivity down a nonmetal group?

• Reactivity increases

• Reactivity decreases

• Reactivity does not change as you go down the group

• The reactivity fluctuates